JPH11241235A - Device for guiding sliver installed in yarn processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for guiding a sliver, having a simplified structure, enabling the center of a circular arc shape to be precisely regulated, capable of improving quality and operability and installed in a yarn processing machine. SOLUTION: This device for guiding a sliver has one or more guiding members 30 arranged at the inlet side of a drafting device of a drawframe, engaging with plural slivers, formed as a member rotatable around an axis line, and having mantle surfaces 30' having various different circular arc shapes. Preferably, the cross section of the guiding member 30 is a polygon having a round angle and a face, and center points M of the guiding members 30 are mutually concentrically arranged in the axis direction of the guiding member 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for guiding a sliver on a guide surface of a guide member extending in a direction perpendicular to a conveying direction of a sliver in a textile machine. The present invention relates to a device which is formed as an arc-shaped member on a plane oriented in a direction perpendicular to the transport direction and is held at a position adjusted by a holding device.

[0002]

2. Description of the Related Art In a known device, a guide member is formed as an arc-shaped deformable member. When pressure is applied to the guide member from both sides to change the width of the sliver, the arc shape changes. The disadvantage is that it is difficult to adjust a uniform (symmetric) arc. In order to achieve an arc of equal center, absolutely equal pressure must be applied to both sides at the same time. In the asymmetric arc shape, the polymerized sliver is drawn unevenly into the machine. This leads to non-uniform processing, especially at high working speeds, and thus to a loss of quality in production. In addition, the pressurizing devices on both sides require equipment costs.

[0003]

SUMMARY OF THE INVENTION The object of the invention is to avoid the disadvantages mentioned above and to provide a particularly simple and accurate (symmetric) adjustment of the center of the different arc shapes. It is to provide a device of the type described.

[0004]

The object is achieved according to the invention by the features defined in the characterizing part of claim 1. The use of a guide element having different arc-shaped outer surfaces and rotatable about an axis allows a simple and particularly reliable adjustment of the different arc shapes. The guide member simply continues to rotate, so that the other arc-shaped mantle surface engages the sliver. In this case, all arc shapes are manufactured in a predefined manner, so that they are symmetrically absolutely uniform and equal.

It is reasonable that the cross section of the guide member is a polygon having rounded corners and faces. Advantageously, the cross section of the guide member is formed substantially oval.
Advantageously, the mantle surface is formed in different spherical shapes. Preferably, the radius of curvature of the cross section increases or decreases in a convex manner. It is reasonable that a drive, for example a drive motor, is connected to at least one end face of the guide member. It is expedient for a display, for example a scale, to be connected to the end face of the guide member. Advantageously, the drive is able to rotate the guide member by a defined distance. Preferably, a stepless adjustment device is connected to the holding device. It is reasonable for the drive to be connected to an electronic control and regulation device. Advantageously, two guide members are provided one after the other in the working direction, and the sliver is engaged with the respectively widened area of the mantle surface. Advantageously, the guide member is rotatable in at least one direction. Preferably, the radius of curvature of the arcs in the different areas of the mantle surface is equal. It is reasonable for the center points to be arranged eccentric to one another in the axial direction. Conveniently, the radius of curvature of the arcs of the different extents of the mantle surface is different. Advantageously, the center points are arranged concentrically with one another in the axial direction. Preferably, the guide member is formed in a roller shape. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a drawing machine 1, for example, a drawing machine HSR manufactured by Trutschler, has a draft device 2. A draft device inlet 3 is arranged at a stage preceding the draft device 2, and a draft device outlet 4 is arranged at a stage subsequent to the draft device 2. The sliver 5 comes out of the cans and the sliver guide 6
And is pulled by the delivery rollers 7 and 8 and passes by the measuring element 9. The draft device 2 is designed as a 4-over-3 draft device. That is, the draft device 2 includes three bottom rollers I, II, and III (bottom front roller I, bottom middle roller II, and bottom back roller III) and four top rollers 11,
12, 13, and 14. In the draft device 2, the polymerization sliver 5 composed of a plurality of slivers is drafted. Draft consists of break draft and main draft. Roller pairs 14 / III and 13 / II form a break draft zone and roller pairs 13 / II and 11, 12
/ I forms the main draft area. The drafted sliver 5 is supplied to the web guide 10 at the draft device outlet 4.
, And are passed through the sliver funnel 17 by the delivery rollers 15 and 16, where they are combined into the sliver 18. Next, the sliver 18 is stored in the can. For example, the delivery rollers 7, 8, the bottom back roller III, and the bottom middle roller II, which are mechanically connected via a toothed belt, are driven by a speed change motor 19, at which time a target value can be set (the attached top roller 14). Or 13 rotates together). The bottom front roller I and the delivery rollers 15, 16 are driven by a main motor 20. The speed change motor 19 and the main motor 20 are each provided with a unique adjuster 21 or 2.
Two. The adjustment (rotational speed adjustment) takes place via a respectively closed adjustment circuit. In this case, a tachometer generator 23 is attached to the controller 19, and a tachometer generator 24 is attached to the main motor 20.

At the draft device inlet 3, a size proportional to the mass, for example, the cross-sectional area of the supplied sliver 5, is measured by an inlet measuring member 9. Draft device exit 4
Here, the cross-sectional area of the advanced sliver 18 is detected by the outlet measuring member 25 attached to the sliver funnel 17. A central computer unit 26 (control and control unit), for example a microcomputer with a microprocessor, communicates to the controller 21 the adjustment of the target value for the transmission motor 19. The measured values of both measuring members 9 or 25 are transferred to the central computer unit 2 during the drafting process.
It is conveyed to 6. A target value for the transmission motor 19 is defined in the central computer unit 26 from the measured value of the inlet measuring member 9 and the target value for the cross-sectional area of the discharged sliver 18. The measured value of the outlet measuring member 25 is used for monitoring the discharged sliver 18 (outlet sliver monitoring). With this control system, variations in the cross-sectional area of the supplied sliver 5 can be compensated for by appropriately controlling the break drafting process, or leveling of the sliver 18 can be achieved. The central computer unit 26 of the machine is associated with a storage device 27, in which the specific signals of the draft control control system are stored for evaluation. The traveling direction of the sliver is indicated by A.

At the entrance of the drafting device 2, a roller pair 1 is placed between the delivery rollers 7, 8 and the roller pair 14 / III.
Just before 4 / III, the guide member 30 is arranged.
The outer surface of the guide member 30 is engaged with the sliver 5, and the guide member 30 is formed so as to be rotatable around its axis. The guide member 30 is connected to a driving device, for example, a step motor 31 that is electrically connected to the central computer unit 26. Sliver 5 is draft device 2
Before entering the vehicle, it is guided through the guide member 30 as shown in the plan view of FIG. At this time, the sliver 5 extends outward as viewed in the width direction (from 5a to 5b). The guide member 30 is formed in the shape of a roller, and has end regions 32a,
32b (see FIG. 7A), the holding device 33a or 3
3b rotatably supported.

In the example shown in FIG. 3, initially a plurality of slivers 5 are closely aligned, below the first straight sliver guide piece 34 and then over the guide member 30 on the outer jacket surface. Passed over. Then, the plurality of slivers 5 are passed under the second straight sliver guide piece 35 in a closely aligned manner.

In the guide member 30 shown in FIG.
Is formed as a roller rotatable in the direction of arrow B as shown in FIG. That is, as shown in FIG. 4 (B), the arc shape of the spherical mantle surface 30 'has various radii of curvature r. M represents the center point of the end face 30, about which the guide member 30 can rotate in the direction B. FIG. 7 (B)
As shown in FIG. 8B, the guide member can also rotate in the opposite direction.

FIG. 5 shows a scale plate 3 having a scale and a fixed position.
The scale 36 can be attached to the end face 301.
The needle 37 is attached to a rotatable end face 301.
By doing so, the position of the guide member 30 can be manually adjusted according to the designated conditions. A manually or mechanically adjusted position of the guide member can also be displayed optically.

In the example shown in FIG. 6, two guide members 30a and 30b are provided one after another in the working direction.
In this case, the sliver 5 is engaged with the respectively widened area of the mantle surface 30 '. In this way, some combinations can be adjusted for the spread.

In the example shown in FIG. 7, as shown in FIG. 7A, the convexly curved mantle surface of the guide member 30 has three sections 30 ', 30 "or 30"'. FIG.
As shown in (B), these three areas 30 ', 30 "
Alternatively, the radii of curvature r1, r2, r3 for 30 ″ ′ are equal to each other. A specific center point of the radii of curvature r1, r2, r3 is denoted by M2. The center point M1 at which the guide member 30 rotates in the directions of arrows B and C is , Located outside the center point M2 (in an eccentric manner), so that, despite the radii of curvature r1, r2 and r3 being equal, the areas 30 'engaged with the sliver 5; 30 ", 30"'
Are different from each other with respect to the rotating center point. This arrangement is advantageous in terms of manufacturing technology, because a milling cutter with a concavely curved cutting surface can be used for all three sections 30 ', 30 "or 30"', for example.

In the example shown in FIG. 8, the convexly curved outer surface of the guide member 30 shown in the perspective view of FIG.
As shown in (B), there are three sections 30 ', 30 "or 30"'. Zone 30 ', 30 "or 3
The radii of curvature r1, r2 and r3 for 0 ″ ″ are different. The center point M for the radii of curvature r1, r2 and r3 and the center point M for the guide member 30 to rotate in the directions of the arrows B and C are the same. By doing so, the arcs of curvature of the sections 30 ', 30 "or 30"' engaging the sliver 5 are different, even though the center point M is identical (concentric).

In the example shown in FIG. 9, as shown in FIG. 9A, the outer distance of the mantle of the section 30 "" from the longitudinal axis defined by the center point M is different. The distance a is greater than the distance b.Similarly, the guide member 3 defined by the center point M of the lower jacket of the area 30 '.
The radial distance (spacing) from the zero longitudinal axis is different and the distance c is smaller than the distance d. In this way, an arcuate shape (curvature) is achieved along the axial direction, which results in the desired spread of the sliver. FIG. 9B shows a configuration similar to that of FIG. 9A, but the longitudinal axis defined by the center point M and the rotation axis 32 are not the same,
They are arranged eccentrically with respect to each other.

In the example shown in FIG. 10, the radii of curvature r1, r
2, r3 are equal in length and intersect at a common center point M2, but do not protrude from the center point M2. That is, they do not have a common starting point. Rotary shaft 32 of guide member 30
Is eccentrically arranged with respect to the center point M2 (see FIG. 9 (B)), so that the curve which engages the sliver 5 when rotating around the axis during operation. Different spacings between the defined areas 30 ', 30 "or 30"' and the axis of rotation, and thus different lateral extents, are realized.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a drawing machine having the device of the present invention.

FIG. 2 is a plan view of a part of the drawing machine shown in FIG.

FIG. 3 is a perspective view of the guide member of the present invention when the sliver is passed.

4A and 4B show a roller-shaped guide member having an arc curvature in which a mantle surface continuously increases or decreases, FIG. 4A is a front view, and FIG. 4B is a cross-sectional view.

FIG. 5 is a view showing a scale plate having a scale connected to an end face of a guide member.

FIG. 6 is a view showing two guide members arranged one after another.

7A and 7B are diagrams showing a configuration having three sections of a mantle surface where an eccentric center point is present, wherein FIG. 7A is a front view, and FIG. 7B is a view showing FIG. 2) is a sectional view taken along line II-II.

8A and 8B are diagrams showing a configuration having three sections of a mantle surface where a concentric center point is present, wherein FIG. 8A is a perspective view and FIG. 8B is a line III-III. It is sectional drawing by a line.

FIG. 9 is a view showing a configuration in which a radial distance from the guide member longitudinal axis of the mantle surface is different along the longitudinal axis;
9A is a front view when the longitudinal axis and the rotation axis are the same, and FIG. 9B is a front view when the longitudinal axis and the rotation axis are different.

FIG. 10 shows that the radius of curvature is the same and each radius of curvature intersects at the same center point M2, but their centers are different, and the rotation center M1 of the guide member is eccentric with respect to M2. It is sectional drawing which shows a structural form.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drawing machine 2 ... Draft device 3 ... Draft device inlet 4 ... Draft device outlet 5 ... Sliver 26 ... Electronic control adjustment device 30, 30a, 30b ... Guide member 30 ', 30 ", 30"' ... Outer surface 31 ... Driving device 36: Display device r1, r2, r3: Curvature radius of section

Claims (17)

[Claims] 1. A device for guiding a sliver on a guide surface of a guide member extending in a direction perpendicular to a conveying direction of a sliver in a textile machine, wherein the guide member is perpendicular to a conveying direction of the sliver. In the form of an arcuate member on a plane oriented in the direction, which is held in a position adjusted by a holding device, at least one guide member (30; 30a, 30b) is provided in the drawing machine. It is arranged on the inlet side of the drafting device (2) and is formed as a member that engages with a plurality of slivers (5) and is rotatable around an axis, and includes a guide member (30; 3).
0a, 30b) mantle surface (30 ', 30 ", 30"")
Has a different arc shape for guiding slivers provided on a textile processing machine. 2. The device according to claim 1, wherein the cross section of the guide member is a polygon with rounded corners and faces. 3. The device according to claim 1, wherein the cross-section of the guide member is substantially elliptical. 4. The mantle surface (30 ′, 30 ″, 3)
0 "") are formed in different spherical shapes.
The device according to any one of claims 1 to 3. 5. The device according to claim 1, wherein the radii of curvature (r1, r2, r3) of the cross section increase or decrease in a convex manner. 6. A drive device (3) on at least one end face (301, 302) of the guide member (30; 30a, 30b).
1) Apparatus according to any one of the preceding claims, wherein the drive motor is connected. 7. A display device (36) connected to an end face (301, 302) of the guide member (30; 30a, 30b), for example, a scale plate.
Item. 8. The driving device (31) includes a guide member (3).
0; 30a, 30b) can be rotated by a defined interval. 9. The device as claimed in claim 1, wherein a stepless adjusting device is connected to the holding device. 10. The device according to claim 1, wherein the drive device (31) is connected to an electronic control and regulation device (26). 11. A region in which two guide members (30a 30b) are arranged one after the other in the working direction, and the sliver (5) extends over each of said mantle surfaces (30 ', 30 ", 30""). 11. The device according to any one of the preceding claims, wherein the device is engaged with. 12. The device according to claim 1, wherein the guide member (30; 30a, 30b) is rotatable in at least one direction (B, C). 13. A mantle surface (30 ', 30 ", 30"').
Radius of curvature (r1, r
Device according to any of the preceding claims, wherein 2, r3) are equal. 14. The method according to claim 1, wherein a center point (M1) of the rotation axis and a center point (M2) at which a plurality of lines of curvature radii intersect are eccentrically arranged in the axial direction of the guide member. An apparatus according to any one of the preceding claims. 15. A mantle surface (30 ', 30 ", 30"')
Radius of curvature (r1, r2, r
15. The device according to claim 1, wherein 3) is different. 16. Device according to claim 1, wherein the center points (M) are arranged concentrically with one another in the axial direction of the guide member. 17. The device according to claim 1, wherein the guide member is formed as a roller.